Motor governor



Nov. 28, 1933. F. VAN DER WouDE MOTOR GOVERNOR Filed Aug. 12, 1931 I IJ 1 INVENTOR. Fritz Vom Der Woudc.

A TTORNE Y.

Patented Nov. 28, 1933 Moron covsnnoa Fritz van der Woude, Elyria; Ohio, assig'nor to" The General Industries Company, Elyria, Ohio,

a corporation of Ohio,

Application August 12, 1931. Serial No. 35 ,521)

19 Claims. 1(c1. 188 -187) My invention relates tocentrifugallgovernors and relates more particularly'to governors applicable to controlling the speed of such mechanisms as phonograph motors and the like, em ploying either electric motor or spring motor power.

In motor mechanisms such asempl'oyed for driving a phonograph turntable, the maintenance of a. predetermined rotational speed is ofimportance, and centrifugal governors of various types have long been employed, and of these types the general type relying upon the effect of braking of a rotational motor part commensurably with the speed at which said part is rotated, is most commonly employed; a

An object of the present inventionis toprovide an improved centrifugal governor of a form adapted for disposition in a very'narrow space extending in the direction of the axis of the rotating part, such as a phonograph motor driven shaft. Y 1

'Another 1 object of' my invention istoprovide an improved centrifugal governor adapted to effect a very graduatedbut heavy brakingeffect;

upon the motor shaft commensurablywith fincreases of speed of such shaft. 7

Another object of my invention is to provide inventionrand in which description reference will be had to the accompanying drawing the saidembodiment;

Referring to the drawing; Fig. 1 illustrates, in' side elevational view, a centrifugal governor mechanism applied to arotatable shaft'of a motor whose speed is to be controlled thereby, a part of the enclosing casing illustrating being illustrated in longitudinal medial sectional view;

Fig. 2 is a plan view of the apparatus of Fig; I

1, certain of the parts, however, being shown in transverse section taken on horizontal planes,-

which will be apparent by reference to Fig. '1, a fragment of an indicating scale being also illustrated in plan view;'"

Fig. 3 is an end elevational view' and 1 plate 1. M

Fig. 4 a vertical sectional viewtofa spr n mounted adjustable frictionalelement employed in the embodiment of inventionillustrated in the foregoing figures i v Referringto the figuresof drawingin allof 5 which like parts are designated by like reference" characters, at-l and 2-1 show preferably like corn;

' plementary, plates, each with an enlarged central.

portion'whichis boredaxially to permittheplates to ,be telescoped onto the motor. shaft 3. I Y,

At -17-,17 I-have'shown centrifugal weights disposed on opposite sidesof the shaft 3 connected to central portions of leaf springs-13 and l4,"the opposite end-portions of whichare respectively connected to the plates 1 and}. A bushing-15 pressed into-the bore of the plate 1 and telescoped onthe shaft .3 andrigidly connected to theshaft by a set screw 4 rigidlyconnects the plate-l with the shaft "3 to rotate therewithu Abushing 5' pressed into the boreofthe plate 2 to rigidly con-, nect-it therewith has rotational and axial move:-

1 Confronting portions of the plates 1 and 2 are formed with mating interengaging cam surfaces.

Upon rotation'of theshaft 3,1plate land springconnected plate 2," the,fcentrifugal= devices '17 g i move outwardly to varying degree and cause the plates Land v2 to --react on theiIt-camsurfaces to cause the plate 2to moye axiallyrelativeto the A centrifugal device'of this-characterwhereby the plate'2is movedsaxially in correspondence with speed of revolutionof the'shafti 3 isjfully. illustrated and described ;in my Patent. No. 1,807,052, May 26,j193l,',in 'whichfs ubstantially menton the shaft=3- and externally of thejgpl'ate 1 '2 is provided with,a]collar 35.-

the same reference characters asused in theg therefore believed unnecessaryto describe'in de-" patent in connection with this application. v

The plate 2 isejoined-to a smooth rotatable disc .23 by means of the bushing- 5', theplate '23being rigidly secured to thebushing in any suitable lar 35 ofthe bushing.

foregoing brief description: are employed; It is f Cooperatingiwiththe disc aslwhich is shiftable "axially ofthe shaft 3by the. centrifugal action of the governor'balls -17,;together with the plate 2, is a substantially stationary friction pad 20,;--

whichiscarried by a cup element, 21, said pad.

being recessed partially within said cup-and par.- tiallyconflned'by the annular walls thereof; The I cupiis carried by its. end wal1 33 onthe-medial." 1P

. 0 l manner andpositionedthereon against the col- 7 opposite direction projectsinto aligned openings 46 of the spring and 47 of'the end-wallf33 portion of a leaf spring 25 to which it is medially afiflxed by rivets 34. The spring 25 is slotted at 36 at the longitudinal ends, said slots 36 reaching mounting screws 30, which are turned only partially to a complete home position, into threaded openings 31 in a governor frame cast-= ing 37.

Theicasting 37 isprovided with apair of spaced parallel lugs 38 and 39 within which there is journaled an adjusting rod 40 rotatable therein, a bearing bushing 41 being provided in thelug 39, the rod 40'being telescoped through saidbearing bushing and a rotatable cam 27 being rigidly aflixed by a tubular proj ection'27" on .theend of said rod 40, a pin'42 being projected through said tubular projection and the end of said rod. A spring 32 with a cooperating collar 43with cotterv pin 44 restrains downward longitudinal movement of the rod 40 through the lugs to maintain" projection ofthe motor shaft 3;; Y

A thrust'bearing ball 28 is'disposed within an aperture 45' of'the end wall of the casting 37 and extends laterally into engagement with the cam face of the cam'27 in "one direction, and in' the the cam 27 in axial alinement with a longitudinal of the friction padfsupporting cup-21; 'I'he'apertures 46 and 47 are of insufficientsiz to permit the ball 28 being projected therethrough so that the surface'of theball extending within the" aperture thus makes bearing engagement with the edges of said'apertures and the cam 27 being rotatedto" different adjusted positions by rotational movements ofthe rod 40 effected by the indicating handle 48 'a'flix'edto'the end of said rod, projects the ball '28 inwardly and outfwardly' against the spring pressure of the spring 25 to move the cup'21axially toward 'and 'away from-the disc 23 accordingto the axial adjustment desired to be effected between thefrietion pad 20-and the friction-disc '23.;-

The adjustment effected by'rotation of the rod 40 will remain'substa'ntially' permanent for .long'p'eriod'of' useof the-in'otorfdue to the reaction of the coil spring 32' introducing the element of friction into the capability of therod'40 to The relative axial 'fmovement ofthe plates 1 and 2,-"'re'sponsive to an increase of shaft speed, moves the plate '2 outwardlyon the'shaft 3" and away from the plate 1,thus effecting' a correspondingoutward movement of the rotating disc 23," causing an increased pressure engagement of the disc with the'annul'ar friction pad or surface g '20 carried on the inner face of the cup 21.

' 5 I'Ifhe frictional engagement had-between the pad 20 and the frictionafbrakingsurface of the rotatable disc 23, efi'ectsaretardation in rotational speed of the plate'2, and which retardation is communicated to the shaftthrough the springs 13 and' 14.-' V

pad 20 is stationary in'its adjustedpositionf'and theirotatable disc surface 23; attached directly to plate 2, is moved axially' against the pad upon the increased speed, andtlie frictionpad consequently engages it with increased "pressuregre tarding; its rotative speed,whereuponthe springs .13 and'14 resiliently retract the plate 2 to tend to withdraw it from contact With'the pad."

All of these effects occur}coincidentally; and the speed is maintained within very narrow limits at substantially a constantispeed, even though '75 there be, from time to timegvariations-in motor During operation of the device,- meantim driving effect, orin thepower required to drive the load, such as aphonograph turntable, since to compensate for such effects there will be opposite compensating variations in frictional'retardation effected'upon the disc 23, directly attached to plate 2-, and thereby upon the shaft carrying the plate.

h Having thus described my ferred embodiment, I am aware. that numerous and extensive departures may be made from the invention in a pre= embodient herein illustrated and described, but

"having anannular friction surface adapted for engagement with an "annular snbstantially coaxial" surface portion of said plate to retard rotationlthereof and engageable thereby with degrees ofpressure according to the axial thrust eifort imparted to said plate by said centrifugal "means anda support for the friction means'perimitting universal rocking movement thereof.

'2. In a governor mechanism, in combination a driven shaft, centrifugalmeans' operable-by rotation of the shaftto effecta thrust axially thereof, a plate rotatable bythe shaft movable axially with, respect thereto responsive to the axial thrust of said centrifugal means; and friction means having an; annular substantially coaxial friction surface adapted for engagement with .an, annular substantially coaxial surface portion'of said plate to retard rotation there- I of and engageable thereby with degrees of pressure 'accordingto the'raxialthrust effort imparted to said plate by said centrifugal means, a support for said'friction meansand a resilient ing movement. 3.121 a governor mechanism, in combination a driven Shaft; centrifugal means operable by rotation of the shaft ;to effect-- a I thrust axially thereof, a plate rotatable by the shaft movable axially with respect thereto responsive to the axial thrust of said centrifugal means, and frictionmeansqhaving an annularfrictionfsur'face adapted for engagement with an annular, surface of said plate to retard rotation, thereof andren- .gageable'thereby with degrees of pressure' ac cording to the. axialthrustefiort imparted to mounting for; saidxsupport; said mounting 'comprising; aflleafi' spring :m alin engagement with -saidsupport to resiliently permit universal ,rock- 1'2 said plate by said centrifugal-means, a support ;for said friction pad and a resilient mounting for said support, said mountingcomprising aleaf spring making engagement ,withsaid support, to

thereof, andadjusting' means comprising an eleresiliently permit universal rocking movement ment -engageable with said; support by a portion ;thereof disposed axially, ofsaid shaft and means for adjusting-its longitudinal position with respect thereto. y g v, s a, V 77 Line verning mechanism, in combination,

.ai centrifugal means, a shaft for imparting rov tational-movementthereto, an element respon- "sive to rotational movement of said centrifugal means 'tormove it-axiallyof said shaft, said element being. coincidentally rotated by, said shaft,

and having an outer annular-friction surface concentric with andspaq d-fr0mitS axis 10f M.

a so

its

6 24 tation, a friction pad ofyieldable friction material of annular form adapted for engagement with said frictionfsurfa'ceof said element and a support for said friction pad supportingit by a side thereof remote from said element, resilient means resiliently impellingjsaidsupport permitting "universal rocking movement of said element and non-resilient adjustable means restraining said supportfrom" movement in the opposite direction from said element;

EL-In a governor mechanism, in combination, a driven shaft, centrifugal'means operable by rotation of the shaft to effect a thrust axially thereof, a brake'element rotatable by the shaft movable axially with'respect thereto responsive to the axial thrust of said centrifugal means, and

friction means having an annular friction surface adapted for engagement withan annular substantially coaxial surface portion of the brake element to retard rotation thereof and engageable I thereby with degrms of pressure-varying according to the axial thrust effort imparted to said brake element bysaid centrifugal means and a J support for the friction means permitting universal rocking movement thereof.

6. In a governor mechanism; in'combination,

a driven shaft, centrifugal means operable by rotation of the shaft to effect a thrust axially thereof, a brake element rotatable by theshaft making engagement with the support to 're-, siliently permit universal rocking movement,

thereof '7. In a governor mechanism, in combination, a I

driven shaft, centrifugal means operable by rotation of the shaft to effect a thrust axially thereof, a brake element rotatable by the shaft movable axially with respect thereto responsive axial thrust of said centrifugal means, friction means having an annular substantiallycoaxial friction surface adapted for engagement with an annular substantially coaxial surface portion of said brake element to retard rotation thereof and engageable thereby with varying degrees of pres sure according to the axial thrust effort imparted to said brake element by'said centrifugal means, a' support for said friction means, and a resilient mounting for said support, said mounting comprising a leaf spring making engagement with said support to resiliently permit universal rocking movement thereof,

8. In a governor mechanism, in combination, a driven shaft, centrifugal means operable by rotation of the shaft to effect a thrust axially thereof,

a brake element rotatable by the shaft movable axially with respect thereto responsive to the axial thrust-of said centrifugal means, friction means having an annular friction'surface adapted for engagement with an annular substantially coaxial surface portion of said brake element to retard rotation thereof and engageable thereby with degrees of pressure according to the axial thrust effort imparted to said brake element by said centrifugal means, a support for said fric-' to the axial thrust of a face portion.

thrust, a brake element rotatable by the rotatable-,

to the element engageable with 'said support upon-a portion thereofdisposed substantially axially of the shaftand meansfor 'adjusting the longitudinal position of the adjusting means. f

in combination, 'a driven shaftycentrifugal means operable-by 9. In a governor mechanism;

rotation of the shaft to effect a thrust axially thereof, 'a brake element. rotatable by the shaft. movable axially with-Jre'spect' thereto'responsive said centrifugal means, fric-' 'tion means and adjusting means-comprising an tion means' having' an annular-substantially*coaxial friction surface adapted-"for?engagement with an'annular' substantially'coaxial surface portionof said brakeelementto retard-rotation thereof: and'engageable'thereby with degrees of pressure varying according I to 'theaxial -;-thrust 1 effortimpartedto said brake elementgby' said cenk trifugal means, a support for said'frfction means,

a resilient universally rockabie mounting for said support; and adjusting means comprising an ele- -ment "'engag'eable" with the support'by a'portion thereof disposed substantially axially of theishaft and means for adjusting its longitudinal position v,

with respect thereto; V

10. In a speed governing mechanism, a driven rotatable element, centrifugal means operable by rotation of the rotatable element to effect a thrust,

a brake element rotatable bythe rotatable ele ment movable responsive'to the thrust of the 195 centrifugal means, frietion means engageable with the brake element on a surface portion there- 5 of to retard rotation thereof, and with degrees of pressure varying according to the thrust effort.- imparted to the brake element by the centrifugal I means, and a support for thefrictionmeansj 1 permitting universal rocking movement thereof to maintain substantially equalize'd'engagement" of the friction means andthe brake elementsu'r- 1 1.'In a speed rotatable element,- centrifugal means operable by rotation of the rotatable element to effect a,

element movable responsive, to the thrust of the centrifugal means, friction means engageable with nular surface portion thereof toretard rotationv thereof, and with degrees of"pressure"varying I according to the thrust effort imparted to the brake element by the centrifugalmeans, and a l15 governing mechanism, a driven- "the brakeelement on a substantially coaxial ansupport for the friction means permitting universal rocking movement thereof to maintain substantially, equalized engagement of the friction means and thebrake element surface portion. I 12. ,A speed governing mechanism as described inclaim l0 and in which adjusting meansis pmi- I vided comprisingfan adjustablymovablejelement associated with'the friction means and adapted to exert thrust upon a portion thereof disposed substantially coaxially, of the axis of rotation of the rotatable element and means to axially adjust the position of the adjustably movable element. v inclaim 11 and in which adjusting means is pro--' 13. A speed governing mechanism as described vided comprising an adjustably movableelement associated with the i to exertthrustupon a portionthereof disposed substantially coaxially of the axis of rotation ofla the rotatable element and means to axially-ada friction means and adapted. I

just the position of the adjustably movable ele-" ment.

7 14;. a speed governing mechanism, a driven rotatable element, centrifugal means operable by rotation of the rotatableelement to effect a a thrust, a first brake-element rotatable by the thereof and with degrees of pressure varying according to the thrust effort imparted tothe first brake elementby the centrifugal means, and the v two brake elements being supported to permit relative universal rocking movement to maintain equalized contactsat the'braking surface.

15. In a speed governing mechanism, a driven ;rotatab1e element, centrifugal means operable by rotation of the rotatable element to effect a thrust, a first brake element rotatable by the rotatable element,v movable responsive to the thrust of thecentrifugal means, a second brake element engageable with the first brake element upon a substantially coaxial annular surface a portion thereof to retard rotation thereof and with degrees of pressure varying according to the thrust effort imparted to the first brake element 7 Lee by the centrifugal means, and the two brake ole mer ts being supported to permit relative vuniversal rocking movementlto, maintain equalized contacts at the brake surface;

16. A speed'go'verning mechanism described.) in claim 10, and in which the friction means is supportedon a .spring support to provide universal rocking movementtherefon- V 17. A speed governing mechanism-asdesoribed in claim 10' and in which the friction means is supported on a central portion ofa flat leaf spring to provide the universal-mocking movementthereof..

18. A speeoljgoverning mechanism as described in claim14 and in which one of the brake elepermit; the I ments' is supported von aspring to relative universal movement thereof.

' 19. A speed governing mechanism as described in claim '15 and in which one: of the brake elements is supported on-a spring to provide the relatiVe universal rocking movement.

FRrrZ vA'N m, Woman. 

